trying to explain variation in job performance with age alone is likely to limit
explanatory power, as age-related characteristics such as cognitive ability
and work experience may be better predictors of job performance
(Kanfer & Ackerman, 2004; Klein, Dilchert, Ones, & Dages, 2015).
Kooij, Bal, and Kanfer (2014) illustrates the usefulness of
including mediators of relationships between age and work outcomes.
These researchers showed that workers’ future time perspective and
promotion focus mediate the negative relationships of age with work-related
growth motives and motivation to continue working